Accession Number : ADP005075

Title :   An Overview of Programs for Calculation of Undulator Radiation Spectra,

Corporate Author : COMITATO NAZIONALE PER L'ENERGIA NUCLEARE FRASCATI (ITALY) LABORATORI NAZIONALI DI FRASCATI

Personal Author(s) : Bartalucci,S.

Report Date : OCT 1985

Pagination or Media Count : 6

Abstract : When considering how to optimize undulator design, numerical tools are needed to provide precise calculations of radiation spectra and angular distributions under various conditions. Here a short description of some existing computer codes is given, which make use of different and somewhat complementary approaches. In particular, consider: (1) methods based on straightforward integration of general radiation formulae; (2) those based on the Fast Fourier Transform algorithm (FFT); (3) those based on a given analytical form of the trajectory in an ideal undulator; (iv) those based on appropriate approximations of exact formulae for some special case. In some cases, convolution of radiation spectra with the phase space distribution of both the electron beam and the detector is taken into account.

Descriptors :   *PARTICLE ACCELERATOR COMPONENTS, *EMISSION SPECTRA, SPECTRUM ANALYSIS, ANGLES, ALGORITHMS, FAST FOURIER TRANSFORMS, CONVOLUTION INTEGRALS, COMPUTER PROGRAMMING

Distribution Statement : APPROVED FOR PUBLIC RELEASE